Optical assembly and rear-view mirror assembly comprising same

ABSTRACT

The optical assembly disclosed in the embodiment includes a housing having an inclined bottom surface, a plurality of inner surfaces around an outer periphery of the bottom surface, and a receiving space in which an upper portion is opened; and a lighting module disposed on the inclined bottom surface, wherein the lighting module includes a substrate inclinedly disposed on the inclined bottom surface; at least one light emitting device disposed on the substrate; and a resin layer sealing the light emitting device and the substrate, wherein an upper surface of the resin layer emits light by diffusing light emitted from the light emitting device, wherein the plurality of inner surfaces includes a first inner surface adjacent to the light emitting device, a second inner surface facing the first inner surface, and third and fourth inner surfaces facing each other and disposed between the first and second inner surfaces, wherein a height between the bottom surface of the housing and an upper surface of the housing increases from the first inner surface toward the second inner surface, and decreases from the third inner surface toward the fourth inner surface.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a Continuation of U.S. application Ser. No.17/791,080, filed Jul. 6, 2022, which is a U.S. National StageApplication under 35 U.S.C. § 371 of PCT Application No.PCT/KR2021/000704, filed Jan. 19, 2021, which claims priority to KoreanPatent Application Nos. 10-2020-0009187, filed Jan. 23, 2020 and10-2020-0112442, filed Sep. 3, 2020, whose entire disclosures are herebyincorporated by reference.

TECHNICAL FIELD

An embodiment relates to a lighting module having a light emittingdevice and providing a surface light source.

An embodiment relates to an optical assembly having a lighting module.

Embodiments relate to a rear-view mirror assembly including an opticalassembly.

BACKGROUND ART

Typical lighting applications include vehicle lights as well asbacklights for displays and signage.

Light emitting devices, for example, light emitting diodes (LEDs) haveadvantages such as low power consumption, semi-permanent lifespan, fastresponse speed, safety, and environmental friendliness compared toconventional light sources such as fluorescent lamps and incandescentlamps. Such the light emitting diode is applied to various opticalassemblies such as various display devices, indoor lights, or outdoorlights.

Recently, as a light source for a vehicle, a lamp employing a lightemitting diode has been proposed. For example, light emitting diodes arebeing applied to vehicle headlights, tail lights, turn signals, and thelike. Since the light emitting diode has a small size, it is possible toincrease the design freedom of the lamp. In addition, compared toincandescent lamps, light emitting diodes are advantageous in that theyconsume less power and have a semi-permanent lifespan.

However, since the directivity angle of light emitted from the lightemitting diode is small, when the light emitting diode is used as avehicle lamp, there is a demand for increasing the light emitting areaof the lamp using the light emitting diode.

For example, the light emitting diode may be applied to a blind spotdetection (BSD) system. The blind spot detection system is a system thatdetects other vehicles located behind and to the side of the driver witha sensor device of the vehicle, and provides information about it to thedriver through visual, auditory, tactile, and the like. In such theblind spot detection system, a light emitting diode may be disposed in aside mirror, a rear-view mirror, or an A-pillar region of a vehicle tovisually provide rear sight information to the driver.

However, as light is emitted in various directions from the lightemitting diodes, there is a problem in that visual information is noteffectively provided to the driver. In addition, there is a problem inthat the light emitted from the light emitting diode may be emitted inthe direction of the driver of another vehicle, thereby obstructing theview and causing an accident.

Accordingly, there is a need for a new optical assembly and a blind spotwarning device that may solve the above problems.

DISCLOSURE Technical Problem

An embodiment is to provide an optical assembly capable of improving theluminous intensity of a surface light source and a blind spot warningdevice.

In addition, an embodiment is to provide an optical assembly capable ofimproving the uniformity of a surface light source and a blind spotwarning device.

In addition, an embodiment is to provide an optical assembly capable ofcontrolling a light exit direction and a blind spot warning device.

In addition, an embodiment is to provide an optical assembly capable ofcontrolling a luminance value of light emitted toward a driver and aluminance value of light emitted toward a vehicle positioned on the sidedirection and rear direction of the driver, and an optical assembly andblind spot warning device.

Technical Solution

An optical assembly according to an embodiment includes a housingincluding an inclined bottom surface, a plurality of inner surfacesaround an outer periphery of the bottom surface, and a receiving spacein which an upper portion is opened, and a lighting module disposed onthe inclined bottom surface, wherein the lighting module includes asubstrate inclinedly disposed on the inclined bottom surface, at leastone light emitting device disposed on the substrate, and a resin layersealing the light emitting device and the substrate, and an uppersurface of the resin layer emits by diffusing the emitted light from thelight emitting device, and the plurality of inner surfaces includes afirst inner surface adjacent to the light emitting device, a secondinner surface facing the first inner surface, and third and fourth innersurfaces disposed between the first and second inner surfaces and facingeach other, wherein a height between the bottom surface of the housingand an upper surface of the housing increases from the first innersurface toward the second inner surface, and decreases from the thirdinner surface toward the fourth inner surface.

In addition, the rear-view mirror assembly according to the embodimentincludes a blocking member disposed on an optical assembly and includingan opening region and a mirror member disposed on the blocking member,wherein the optical assembly includes a housing including an inclinedbottom surface, a plurality of inner surfaces around an outer peripheryof the bottom surface, and a receiving space in which an upper portionis opened, and a lighting module disposed on the inclined bottomsurface, wherein the lighting module includes a substrate inclinedlydisposed on the inclined bottom surface, at least one light emittingdevice disposed on the substrate, and a resin layer sealing the lightemitting device and the substrate, and an upper surface of the resinlayer emits by diffusing the emitted light from the light emittingdevice, and the plurality of inner surfaces includes a first innersurface adjacent to the light emitting device, a second inner surfacefacing the first inner surface, and third and fourth inner surfacesdisposed between the first and second inner surfaces and facing eachother, wherein a height between the bottom surface of the housing and anupper surface of the housing increases from the first inner surfacetoward the second inner surface, and decreases from the third innersurface toward the fourth inner surface.

Advantageous Effects

The optical assembly according to the embodiment may emit light as asurface light source, and may have improved luminous intensity andimproved light uniformity. In addition, the optical assembly may preventa hot spot from being formed and minimize loss of light.

In addition, the lighting module of the optical assembly according tothe embodiment may be inclined at a set inclination angle. Accordingly,the optical assembly may control an exit direction of the light emittedfrom the lighting module and a luminance value according to the exitdirection.

In addition, the rear-view mirror assembly according to the embodimentmay minimize light loss and maximize light emitted through the mirrormember. Also, the rear-view mirror assembly may control an exitdirection of the light emitted from the optical assembly and a luminancevalue of the light according to the exit direction. In detail, therear-view mirror assembly may control a light exit direction and aluminance value of the light by an optical assembly inclined at a setinclination angle. Accordingly, the rear-view mirror assembly mayprovide high luminance light to the driver, so that the driver mayeffectively recognize the logo and/or icon of the indicator. Inaddition, a relatively low luminance light may be provided to anothervehicle located at the rear side of the driver's vehicle, therebyminimizing or preventing the driver of the other vehicle from beingdisturbed by the light.

DESCRIPTION OF DRAWINGS

FIG. 1 is an exploded perspective view of an optical assembly accordingto an embodiment;

FIG. 2 is a top view of an optical assembly according to an embodiment;

FIG. 3 is a side view of a housing according to an embodiment;

FIG. 4 is a side view of an optical assembly according to an embodiment;

FIG. 5 is a top view of a lighting module according to an embodiment.

FIG. 6 is a cross-sectional view showing a cross-section taken alongline A-A′ of FIG. 5 .

FIG. 7 is an enlarged view of an area A1 of FIG. 6 .

FIG. 8 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 .

FIG. 9 is an enlarged view of a region A2 of FIG. 8 .

FIG. 10 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 .

FIG. 11 is an enlarged view of a region A3 of FIG. 10 .

FIG. 12 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 .

FIG. 13 is a front view showing a light emitting device on a substratein the lighting module according to the embodiment.

FIG. 14 is a side view of the light emitting device of FIG. 13 .

FIG. 15 is an exploded perspective view of a rear-view mirror assemblyaccording to an embodiment.

FIG. 16 is a cross-sectional view of a rear-view mirror assemblyaccording to an embodiment.

FIG. 17 is a top view of a blocking member according to an embodiment.

FIG. 18 is a view for explaining an emission angle of light emitted fromthe rear-view mirror assembly according to the embodiment.

BEST MODE

Hereinafter, preferred embodiments of the present invention will bedescribed in detail with reference to the accompanying drawings.

The technical spirit of the invention is not limited to some embodimentsto be described, and may be implemented in various other forms, and oneor more of the components may be selectively combined and substitutedfor use within the scope of the technical spirit of the invention. Inaddition, the terms (including technical and scientific terms) used inthe embodiments of the invention, unless specifically defined anddescribed explicitly, may be interpreted in a meaning that may begenerally understood by those having ordinary skill in the art to whichthe invention pertains, and terms that are commonly used such as termsdefined in a dictionary should be able to interpret their meanings inconsideration of the contextual meaning of the relevant technology.Further, the terms used in the embodiments of the invention are forexplaining the embodiments and are not intended to limit the invention.In this specification, the singular forms also may include plural formsunless otherwise specifically stated in a phrase, and in the case inwhich at least one (or one or more) of A and (and) B, C is stated, itmay include one or more of all combinations that may be combined with A,B, and C. In describing the components of the embodiments of theinvention, terms such as first, second, A, B, (a), and (b) may be used.Such terms are only for distinguishing the component from othercomponent, and may not be determined by the term by the nature, sequenceor procedure etc. of the corresponding constituent element. And when itis described that a component is “connected”, “coupled” or “joined” toanother component, the description may include not only being directlyconnected, coupled or joined to the other component but also being“connected”, “coupled” or “joined” by another component between thecomponent and the other component. In addition, in the case of beingdescribed as being formed or disposed “above (on)” or “below (under)” ofeach component, the description includes not only when two componentsare in direct contact with each other, but also when one or more othercomponents are formed or disposed between the two components. Inaddition, when expressed as “above (on)” or “below (under)”, it mayrefer to a downward direction as well as an upward direction withrespect to one element.

The optical assembly according to the present invention may be appliedto various lamp devices that require lighting, such as vehicle lamps,home lighting devices, or industrial lighting devices. For example, whenapplied to vehicle lamps, it is applicable to headlamps, sidelights,side mirrors, fog lights, tail lamps, brake lights, daytime runninglights, vehicle interior lights, door scars, rear combination lamps,backup lamps, etc. In addition, when applied to a vehicle lamp, it isapplicable to a blind spot detection (BSD) system disposed on a sidemirror or an A-pillar. In addition, the optical assembly of theinvention may be applied to indoor and outdoor advertising devices,display devices, and various electric vehicle fields, and in addition,it may be applied to all lighting-related fields oradvertisement-related fields that are currently developed andcommercialized or that may be implemented according to futuretechnological developments.

FIG. 1 is an exploded perspective view of an optical assembly accordingto an embodiment, and FIG. 2 is a top view of the optical assemblyaccording to the embodiment. FIG. 3 is a side view of the housingaccording to the embodiment, and FIG. 4 is a side view of the opticalassembly according to the embodiment. In addition, FIG. 5 is a top viewof the lighting module according to the embodiment.

The optical assembly according to the embodiment may be applied to theleft and right-side mirrors of the vehicle prior to a description of thedrawing FIGS. 1 to 5 , and may provide visual information to the driverof the vehicle.

An optical assembly applied to the left-side mirror adjacent to thedriver's seat will be described with reference to FIGS. 1 to 5 . Sincethe optical assembly applied to the right-side mirror adjacent to thepassenger seat has the same shape and structure as the optical assemblyapplied to the driver's seat and is symmetrical to each other, forconvenience of description, the optical assembly disposed on thedriver's seat will be mainly described.

Referring to FIGS. 1 to 5 , the optical assembly 10 according to theembodiment may include a housing 300, a lighting module 400, an opticalmember 500, and a cover member 600.

The housing 300 may include an opened one side and a receiving space 305therein. The housing 300 may accommodate the lighting module 400, theoptical member 500, and the cover member 600.

The housing 300 has a predetermined reliability and may include amaterial that is not damaged by heat and light emitted from the lightingmodule 400. For example, the housing 300 may include a resin material ora metal material. In detail, the housing 300 may include at least onematerial of plastic, polypropylene (PP), polyethylene (PE),polycarbonate (PC), Polybutylene Terephthalate (PBT), AcrylonitrileButadiene Styrene copolymer (ABS), Poly Oxy Methylene (POM), Polyacetalpolyphenylene oxide (PPO) resin and a modified PPO resin. In addition,the housing 300 may include at least one of silver (Ag), copper (Cu),titanium (Ti), magnesium (Mg), chromium (Cr), molybdenum (Mo), nickel(Ni), aluminum (Al), stainless steel and an alloy including the same.When the housing 300 includes a metal material, the housing 300 mayprovide a heat dissipation path for the lighting module 400.Accordingly, the heat dissipation characteristic of the optical assembly10 may be improved.

The housing 300 may include a material capable of absorbing the lightemitted from the lighting module 400. In addition, a surface of thereceiving space 305 of the housing 300 may absorb the light emitted fromthe lighting module 400. In detail, the housing 300 or the surfacematerial may have a light absorptivity of 50% or more and a lightreflectance of 50% or less. For example, the housing 300 may be providedin a color capable of absorbing the light emitted from the lightingmodule 400. In detail, the material of the housing 300 or the surface ofthe receiving space 305 may include black. Accordingly, it is possibleto prevent or minimize light emitted from the lighting module 400 frombeing reflected on the bottom surface 310 and the inner surface 320 ofthe housing 300. Accordingly, the light emitted from the lighting module400 may be emitted in a set direction.

The housing 300 may include a bottom surface 310 and an inner surface320 formed by the receiving space 305.

The bottom surface 310 of the housing 300 may have various shapes. Indetail, the bottom surface 310 of the housing 300 may have variousshapes, such as polygons, circles, and ellipses, when viewed in a planview. For example, the bottom surface 310 of the housing 300 may have apolygonal shape, for example, a hexagonal shape as shown in FIG. 2 .

The bottom surface 310 of the housing 300 may have an inclined shape. Indetail, the bottom surface 310 of the housing 300 may be inclined in onedirection with respect to the upper surface 301 of the housing 300.

The inner surface 320 of the housing 300 may include a plurality ofinner surfaces. The inner surface 320 of the housing 300 may beperpendicular to the upper surface 301 of the housing 300. The innersurface 320 of the housing 300 may include a first inner surface IS1 anda second inner surface IS2 facing the first inner surface IS1. Inaddition, the inner surface 320 of the housing 300 may include a thirdinner surface IS3 and a fourth inner surface IS4 disposed between thefirst and second inner surfaces IS1 and IS2. In addition, the innersurface 320 of the housing 300 may include a fifth inner surface IS5disposed between the second inner surface IS2 and the third innersurface IS3, and a sixth inner surface IS6 disposed between the secondinner surface IS2 and the fourth inner surface IS4.

At this time, the height between the bottom surface 310 of the housing300 and the upper surface 301 of the housing 300 may increase from thefirst inner surface IS1 toward the second inner surface IS2. Inaddition, the height between the bottom surface 310 of the housing 300and the upper surface 301 of the housing 300 may decrease from the thirdinner surface IS3 toward the fourth inner surface IS4.

That is, based on the direction from the first inner surface IS1 towardthe second inner surface IS2, the bottom surface 310 of the housing 300may be inclined at a first inclination angle a1 with respect to theupper surface of the housing 300.

The first inclination angle a1 may be about 15 degrees to about 40degrees. In detail, the first inclination angle a1 may be about 20degrees to about 35 degrees. When the first inclination angle a1 doesnot satisfy the above-described range, the light emitted from thelighting module 400 disposed on the bottom surface 310 may be emitted inan unwanted direction. For example, when the first inclination angle a1does not satisfy the above-described range, the luminance value of lightemitted in the direction in which the user is located may besignificantly low, and the luminance value of light emitted in anunwanted direction may be significantly higher. Preferably, the firstinclination angle a1 may be about 25 degrees to about 30 degrees.

In addition, based on the direction from the third inner surface IS3toward the fourth inner surface IS4, the bottom surface 310 of thehousing 300 may be inclined at a second inclination angle a2 withrespect to the upper surface of the housing 300.

The second inclination angle a2 may be about 15 degrees to about 40degrees. In detail, the second inclination angle a2 may be about 20degrees to about 35 degrees. When the second inclination angle a2 doesnot satisfy the above-described range, the light emitted from thelighting module 400 disposed on the bottom surface 310 may be emitted inan unwanted direction. For example, when the second inclination angle a2does not satisfy the above-described range, the luminance value of lightemitted in the direction in which the user is located may besignificantly low, and the luminance value of light emitted in anunwanted direction may be significantly higher. Preferably, the secondinclination angle a2 may be about 25 degrees to about 30 degrees.

The bottom surface 310 of the housing 300 may have a shape inclined inthe above-described direction. In detail, the height between the bottomsurface 310 of the housing 300 and the top surface of the housing 300may have the lowest value in a first intersection point P1 defined bythe intersection point of the first inner surface IS1 and the fourthinner surface IS4. In addition, the height between the bottom surface310 of the housing 300 and the upper surface of the housing 300 may havethe highest value in a region adjacent to the fifth inner surface IS5.That is, the bottom surface 310 of the housing 300 may have a shapeinclined from the first intersection point P1 toward the fifth innersurface IS5.

The lighting module 400 may be disposed in the housing 300. The lightingmodule 400 is disposed in the receiving space 305, and may be disposedon the bottom surface 310 of the housing 300. The lighting module 400may have a constant thickness and may emit light as a surface lightsource.

The lighting module 400 may be in direct contact with the bottom surface310 of the housing 300. In addition, the lighting module 400 mayindirectly contact the bottom surface 310 of the housing 300 by anadhesive member (not shown) or the like.

The lighting module 400 may have a shape corresponding to the bottomsurface 310 of the housing 300. For example, the planar shape of thelighting module 400 may have a shape corresponding to the bottom surface310. Accordingly, the lighting module 400 may be easily disposed in thereceiving space 305.

The lighting module 400 may include a plurality of outer surfaces. Forexample, the lighting module 400 may include the first to sixth innersurfaces IS1 to IS6 and first to sixth side surfaces S1 to S6corresponding to each. Each of the first to sixth side surfaces S1 to S6may be a side surface facing the first to sixth inner surfaces IS1 toIS6, respectively.

The lighting module 400 may be inclinedly disposed on the bottom surface310. For example, the lighting module 400 may be disposed to be inclinedat an inclination angle corresponding to the inclined bottom surface 310with respect to the upper surface 301 of the housing 300.

Accordingly, the height between the upper surface of the lighting module400 and the upper surface 301 of the housing 300 may increase in adirection from the first side surface S1 to the second side surface S2.In addition, the height between the upper surface of the lighting module400 and the upper surface 301 of the housing 300 may decrease in adirection from the third side surface S3 to the fourth side surface S4.

That is, based on the direction from the first side surface S1 towardthe second side surface S2, the upper surface and/or the bottom surfaceof the lighting module 400 may be inclined at the first inclinationangle a1 with respect to the upper surface of the housing 300. Inaddition, based on the direction from the third side surface S3 towardthe fourth side surface S4, the upper surface and/or the bottom surfaceof the lighting module 400 may be inclined at the second inclinationangle a2 with respect to the upper surface of the housing 300.

Accordingly, the lighting module 400 may be inclinedly disposed in thehousing 300. At this time, the height between the upper surface of thelighting module 400 and the upper surface of the housing 300 may havethe lowest value at the second intersection point P2 defined as theintersection point of the first side surface S1 and the fourth sidesurface S4. In addition, the height between the upper surface of thelighting module 400 and the upper surface of the housing 300 may havethe highest value in a region adjacent to the fifth side surface S5.That is, the lighting module 400 may have a shape inclined in adirection from the second intersection point P2 to the fifth sidesurface S5.

The lighting module 400 includes at least one light emitting device 100and may emit light as a surface light source. The lighting module 400may emit light in a direction of an opened upper portion of the housing300.

The light emitting device 100 may be disposed in a region having arelatively small height difference from the upper surface 301 of thehousing 300 to emit light in a direction of a region having a relativelylarge height difference. For example, the light emitting device 100 maybe disposed adjacent to the first side surface S1 and may emit light inthe direction of the second side surface S2. In detail, a distancebetween the light emitting device 100 and the first side surface S1 maybe less than or equal to about 20% of a distance between the lightemitting device 100 and the second side surface S2. In addition, adistance between the light emitting device 100 and the third sidesurface S3 may correspond to a distance between the light emittingdevice 100 and the fourth side surface S4.

The optical member 500 may be disposed in the receiving space 305. Theoptical member 500 may be disposed on the lighting module 400. Theoptical member 500 may be disposed in direct or indirect contact withthe upper surface of the lighting module 400.

The optical member 500 may have a shape corresponding to the lightingmodule 400. In detail, the lower surface of the optical member 500 mayhave a shape corresponding to the upper surface of the lighting module400. Accordingly, the optical member 500 may be easily disposed in thereceiving space 305, and may effectively control the light emitted fromthe lighting module 400.

The optical member 500 may be inclinedly disposed on the lighting module400. In detail, the optical member 500 may be inclined at an inclinationangle corresponding to the lighting module 400.

For example, the height between the upper surface of the optical member500 and the upper surface 301 of the housing 300 may increase in adirection from the first inner surface IS1 to the second inner surfaceIS2. In addition, a height between the upper surface of the opticalmember 500 and the upper surface 301 of the housing 300 may decrease ina direction from the third inner surface IS3 to the fourth inner surfaceIS4.

That is, based on the direction from the first inner surface IS1 towardthe second inner surface IS2, the upper surface of the optical member500 may be inclined at the first inclination angle a1 with respect tothe upper surface of the housing 300. In addition, based on thedirection from the third inner surface IS3 toward the fourth innersurface IS4, the upper surface of the optical member 500 may be inclinedat the second inclination angle a2 with respect to the upper surface ofthe housing 300. Accordingly, the optical member 500 may be inclinedlydisposed in the housing 300 by the inclined bottom surface 310 and thelighting module 400. That is, the optical member 500 may have a shapeinclined toward the fifth inner surface IS5 from the first intersectionpoint P1 of the housing 300.

The optical member 500 may control the light emitted from the lightingmodule 400. For example, the optical member 500 may include a prismsheet including a linear prism extending in one direction. In detail,the optical member 500 may include a first optical member including alinear prism extending in one direction and a second optical memberincluding a linear prism extending in the other direction. Here, theother direction may be a direction perpendicular to the one direction.The first and second optical members may focus light emitted from thelighting module 400 in different directions.

The cover member 600 may be disposed in the receiving space 305. Thecover member 600 may be disposed on the optical member 500. The covermember 600 may be disposed in direct or indirect contact with the uppersurface of the optical member 500.

The cover member 600 may have a shape corresponding to the receivingspace 305. For example, the planar shape of the cover member 600 mayhave a planar shape corresponding to the bottom surface 310 of thehousing 300. Accordingly, the cover member 600 may be easily disposedand fixed in the receiving space 305.

The upper surface of the cover member 600 may be provided as a flatplane. For example, the upper surface 301 of the housing 300 may beprovided in a flat plane, and the upper surface of the cover member 600may be disposed on the same plane as the upper surface 301 of thehousing 300.

The cover member 600 may include an inclined surface. In detail, thelower surface of the cover member 600 facing the optical member 500 mayinclude an inclined surface corresponding to the lighting module 400and/or the optical member 500.

In detail, a thickness between the upper and lower surfaces of the covermember 600 may increase in a direction from the first inner surface IS1to the second inner surface IS2. In addition, the thickness between theupper and lower surfaces of the cover member 600 may decrease in adirection from the third inner surface IS3 to the fourth inner surfaceIS4.

That is, based on the direction from the first inner surface IS1 towardthe second inner surface IS2, the lower surface of the cover member 600may be inclined at the first inclination angle a1 with respect to theupper surface of the lighting module 400. In addition, based on thedirection from the third inner surface IS3 toward the fourth innersurface IS4, the lower surface of the cover member 600 may be inclinedat the second inclination angle a2 with respect to the upper surface ofthe cover member 600. That is, the lower surface of the cover member 600may be inclined in the direction of the fifth inner surface IS5 from thefirst intersection point P1 of the housing 300.

Accordingly, the cover member 600 may cover one surface of the openedhousing 300. That is, the cover member 600 may be disposed on thelighting module 400 and the optical member 500 to cover the components400 and 500. The light emitted from the lighting module 400 may beemitted in a direction of an opened upper portion of the housing 300through the optical member 500 and the cover member 600.

FIG. 6 is a cross-sectional view illustrating a cross-section takenalong line A-A′ of FIG. 5 , and FIG. 7 is an enlarged view of a regionA1 of FIG. 6 . The lighting module 400 according to the embodiment willbe described in more detail with reference to FIGS. 6 and 7 .

Referring to FIGS. 6 and 7 , the lighting module 400 covers a substrate401, the light emitting device 100 disposed on the substrate 401, and aresin layer 420 covering and sealing the substrate 401 and the lightemitting device 100. In addition, the lighting module 400 may include areflective member 410 disposed on the substrate 401.

The lighting module 400 may emit the light emitted from the lightemitting device 100 as a surface light source. The lighting module 400may be defined as a light emitting cell or a light source module. Thelighting module 400 may include one light emitting cell or a pluralityof light emitting cells on the substrate 401.

The substrate 401 may include a printed circuit board (PCB). Thesubstrate 410 may include, for example, at least one of a resin-basedprinted circuit board (PCB), a metal core PCB, a flexible PCB, a ceramicPCB, and an FR-4 substrate. When the substrate 401 is disposed as ametal core PCB having a metal layer disposed on the bottom, the heatdissipation efficiency of the light emitting device 100 may be improved.

The substrate 401 may be electrically connected to the light emittingdevice 100. The substrate 401 may include a wiring layer (not shown)thereon, and the wiring layer may be electrically connected to the lightemitting device 100. When a plurality of light emitting devices 100 arearranged on the substrate 401, the plurality of light emitting devices100 may be connected in series, parallel, or series-parallel by thewiring layer. The substrate 401 may function as a base member or asupport member disposed under the light emitting device 100 and theresin layer 420.

The upper surface of the substrate 401 may have an X-Y plane. The uppersurface of the substrate 401 may be flat or have a curved surface. Thethickness of the substrate 401 may be a height in the Z direction. Here,the X direction may be a first direction, and the Y direction may be asecond direction. The Z direction may be a direction orthogonal to thefirst and second directions. A length of the substrate 401 in the firstdirection may be greater than a width in the second direction. Thelength of the substrate 401 in the first direction may be two times ormore, for example, four times or more than the width in the seconddirection.

The substrate 401 may include a light-transmitting material throughwhich light is transmitted through the upper and lower surfaces. Thelight-transmitting material may include at least one of polyethyleneterephthalate (PET), polystyrene (PS), and polyimide (PI).

The light emitting device 100 is disposed on the substrate 401 and mayemit light in a first direction. That is, the light emitting device 100may emit light in the direction of the second side surface S2 of thelighting module 400.

The light emitting device 100 may have an emitting surface 81 throughwhich light is emitted, and the emitting surface 81 may be disposed, forexample, in a third direction or a vertical direction with respect to ahorizontal upper surface of the substrate 401. The emission surface 81may be a vertical plane, or may include a concave surface or a convexsurface.

As shown in FIGS. 13 and 14 , the light emitting device 100 is disposedon, for example, the substrate 401 and may be electrically connected tothe pads 403 and 405 of the substrate 401 by conductive bonding members203 and 205. The conductive bonding members 203 and 205 may be made of asolder material or a metal material.

The light emitting device 100 may be disposed in a relatively upperregion of the inclined bottom surface 310 of the housing 300. The lightemitting device 100 may emit light in the first direction, for example,in a direction from a relatively inclined upper region to a lowerregion.

The optical axis of the light emitting device 100 may correspond to thebottom surface 310. In detail, the optical axis of the light emittingdevice 100 may be parallel to the bottom surface 310 of the housing 300,and may have the first inclination angle a1 with the upper surface ofthe housing 300.

One or a plurality of light emitting devices 100 may be disposed on thesubstrate 401. For example, as shown in the drawing, one light emittingdevice 100 emitting light in the first direction may be disposed on thesubstrate 401.

As another example, although not shown in the drawings, a plurality oflight emitting devices 100 emitting light in the first direction on thesubstrate 401 may be arranged in at least one row or arranged in two ormore rows in the second direction. In addition, the plurality of lightemitting devices 100 may be arranged in at least one row or in two ormore rows in the first direction. Also, the plurality of light emittingdevices 100 may be disposed on the substrate 401 in differentdirections.

The light emitting device 100 is a device including a light emittingdiode (LED), and may include a package in which a light emitting chip ispackaged. The light emitting chip 71 may emit at least one of blue, red,green, ultraviolet (UV) and infrared light, and the light emittingdevice 100 may emit at least one of white, blue, red, green, andinfrared light. The light emitting device 100 may be of a side view typein which a bottom portion is electrically connected to the substrate401, but is not limited thereto. As another example, the light emittingdevice 100 may be an LED chip, but is not limited thereto.

The emission surface 81 of the light emitting device 100 may be disposedon at least one side of the light emitting device 100 rather than theupper surface. The emission surface 81 may be a surface adjacent to thesubstrate 401 among the side surfaces of the light emitting device 100,for example, a side surface adjacent to the upper surface of thesubstrate 401. The emission surface 81 is disposed on a side surfacebetween the bottom surface and the upper surface of the light emittingdevice 100, and emits light of the highest intensity in the firstdirection. The emission surface 81 of the light emitting device 100 maybe a surface adjacent to the reflective member 410 or a surfaceperpendicular to the upper surface of the substrate 401 and the uppersurface of the reflective member 410.

The light emitted through the emission surface 81 of the light emittingdevice 100 may travel in a direction parallel to the upper surface ofthe substrate 401, may be reflected by the reflective member 410, or maybe proceed in the upward direction of the resin layer 420. The thicknessof the light emitting device 100 may be, for example, 3 mm or less, forexample, in the range of 0.8 mm to 2 mm. The length of the lightemitting device 100 in the second direction may be 1.5 times or more ofthe thickness of the light emitting device 100, but is not limitedthereto. The light emitting device 100 may have a wider light beam anglein the ±Y direction than the light beam angle in the Z direction. Thelight beam angle of the light emitting device 100 in the seconddirection may be 110 degrees or more, for example, 120 degrees to 160degrees or 140 degrees or more. The light beam angle in the thirddirection of the light emitting device 100 may be 110 degrees or more,for example, 120 degrees to 140 degrees.

The reflective member 410 may be disposed between the substrate 401 andthe resin layer 420. The reflective member 410 may be provided in theform of a film having a metal material or a non-metal material. Thereflective member 410 may be adhered to the upper surface of thesubstrate 401. The reflective member 410 may have an area smaller thanan area of a upper surface of the substrate 401. The reflective member410 may be spaced apart from the edge of the substrate 401, and a resinlayer 420 may be attached to the substrate 401 in the spaced region. Inthis case, it is possible to prevent the edge portion of the reflectivemember 410 from peeling off.

The reflective member 410 may include an opening 417 in which a lowerportion of the light emitting device 100 is disposed. The upper surfaceof the substrate 401 may be exposed in the opening 417 of the reflectivemember 410 and a portion to which the lower portion of the lightemitting device 100 is bonded may be disposed. The size of the opening417 may be the same as or larger than the size of the light emittingdevice 100, but is not limited thereto. The reflective member 410 maycontact the upper surface of the substrate 401 or may be adhered betweenthe resin layer 420 and the substrate 401, but is not limited thereto.Here, the reflective member 410 may be removed when a highly reflectivematerial is coated on the upper surface of the substrate 401.

The reflective member 410 may be formed to have a thickness smaller thanthat of the light emitting device 100. The thickness of the reflectivemember 410 may include a range of 0.2 mm±0.02 mm. A lower portion of thelight emitting device 100 may penetrate through the opening 417 of thereflective member 410 and an upper portion of the light emitting device100 may protrude. The emission surface 81 of the light emitting device100 may be provided in a direction perpendicular to the upper surface ofthe reflective member 410.

The reflective member 410 may include a metallic material or anon-metallic material. The metallic material may include a metal such asaluminum, silver, or gold. The non-metallic material may include aplastic material or a resin material. The plastic material may be anyone selected from the group consisting of polyethylene, polypropylene,polystyrene, polyvinyl chloride, polybiphenyl chloride, polyethyleneterephthalate, polyvinyl alcohol, polycarbonate, polybutyleneterephthalate, polyethylene naphthalate, polyamide, polyacetal,polyphenylene ether, polyamideimide, polyetherimide,polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystalpolymer, fluororesin, copolymers thereof, and mixtures thereof. As theresin material, a reflective material, for example, a metal oxide suchas TiO₂, Al₂O₃, or SiO₂ may be added in silicon or epoxy. The reflectivemember 410 may be implemented as a single layer or a multilayer, andlight reflection efficiency may be improved by such a layer structure.The reflective member 410 according to an embodiment of the inventionreflects incident light, thereby increasing the amount of light so thatthe light is uniformly distributed.

Also, referring to FIG. 7 , the reflective member 410 may include anadhesive layer (not shown), a reflective layer (not shown), and aplurality of dots 411. The adhesive layer may attach the reflectivemember 410 to the upper surface of the substrate 401. The adhesive layeris a transparent material, and may be an adhesive such as UV adhesive,silicone, or epoxy.

The reflective layer may include a plurality of reflective agents (notshown) inside the resin material. The reflective agents may be a bubble,such as air, or a medium having the same refractive index as that ofair. The resin material of the reflective layer may be a material suchas silicone or epoxy, and the reflective agent may be formed byinjecting air bubbles into the resin material. The reflective layer mayreflect the light incident by the plurality of r reflective agents orrefract it in a different direction. The thickness of the reflectivelayer may be 80% or more of the thickness of the reflective member 410.

The plurality of dots 411 may be disposed to protrude on the uppersurface of the reflective member 410. For example, the plurality of dots411 may be disposed on the upper surface of the reflective layer in ashape protruding from the upper surface. The plurality of dots 411 maybe spaced apart from the light emitting device 100. The plurality ofdots 411 may be spaced apart from the light emitting device 100 in afirst direction and a second direction. The plurality of dots 411 may beformed on the reflective layer by printing. The plurality of dots 411may include reflective ink. The plurality of dots 411 may be printedusing a material including any one of TiO₂, CaCO₃, BaSO₄, Al₂O₃,Silicon, and PS. Each of the plurality of dots 411 may have ahemispherical side cross-section or a polygonal shape. The material ofthe dot 411 may be white.

The density of the dot pattern of the plurality of dots 411 may increaseas the distance from the emission surface 81 of the light emittingdevice 100 increases. In addition, the sizes of the plurality of dots411 may change as they move away from the emission surface 81 of thelight emitting device 100. For example, the width of the plurality ofdots 411 may increase as the distance from the emission surface 81 ofthe light emitting device 100 increases.

Since the plurality of dots are disposed on the upper surface of thereflective member 410 in the emission direction of the light emittingdevice 100, light reflectance may be improved, light loss may bereduced, and the luminance of the surface light source may be improved.

The resin layer 420 may be disposed on the substrate 401. The resinlayer 420 may face the substrate 401. The resin layer 420 may bedisposed on all or a portion of the upper surface of the substrate 401.The area of the lower surface of the resin layer 420 may be the same asor smaller than the area of the upper surface of the substrate 401. Theresin layer 420 may be formed of a transparent material. The resin layer420 may include a resin material such as silicone or epoxy. The resinlayer 420 may include a thermosetting resin material, for example, mayselectively include PC, OPS, PMMA, PVC, and the like. The resin layer420 may be formed of glass, but is not limited thereto. For example, themain material of the resin layer 420 may be a resin material having aurethane acrylate oligomer as a main material. For example, a mixture ofurethane acrylate oligomer, which is a synthetic oligomer, and a polymertype, which is polyacrylic, may be used. Of course, the main materialmay further include a monomer mixed with low-boiling dilution-typereactive monomers such as IBOA (isobornyl acrylate), HPA (hydroxylpropyl acrylate), 2-HEA (2-hydroxyethyl acrylate), etc., as an additive,a photo initiator (for example, 1-hydroxycyclohexyl phenyl-ketone, etc.)or antioxidants may be mixed.

Since the resin layer 420 is provided as a layer for guiding light as aresin, it may be provided with a thinner thickness than in the case ofglass and may be provided as a flexible plate. The resin layer 420 mayemit the point light source emitted from the light emitting device 100in the form of a line light source or a surface light source.

The upper surface of the resin layer 420 may emit light by diffusing thelight emitted from the light emitting device 100. For example, beads(not shown) may be included in the resin layer 420, and the beads maydiffuse and reflect incident light to increase the amount of light. Thebeads may be disposed in an amount of 0.01 to 0.3% based on the weightof the resin layer 420. The bead may be composed of any one selectedfrom silicon, silica, glass bubble, polymethyl methacrylate (PMMA),urethane, Zn, Zr, Al₂O₃, and acryl., the particle diameter of the beadsmay be in the range of about 1 μm to about 20 μm, but is not limitedthereto.

Since the resin layer 420 is disposed on the light emitting device 100,it is possible to protect the light emitting device 100 and reduce lossof light emitted from the light emitting device 100. The light emittingdevice 100 may be buried under the resin layer 420.

The resin layer 420 may be in contact with the surface of the lightemitting device 100 and may be in contact with the emission surface 81of the light emitting device 100. A portion of the resin layer 420 maybe disposed in the opening 417 of the reflective member 410. A portionof the resin layer 420 may be in contact with the upper surface of thesubstrate 401 through the opening 417 of the reflective member 410.Accordingly, a portion of the resin layer 420 comes into contact withthe substrate 401, thereby fixing the reflective member 410 between theresin layer 420 and the substrate 401.

FIG. 8 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 , and FIG. 9 is an enlarged view of a regionA2 of FIG. 8 . In the description using FIGS. 8 and 9 , descriptions ofthe same and similar components as those of the lighting moduledescribed above are omitted, and the same reference numerals areassigned to the same and similar components.

Referring to FIGS. 8 and 9 , a diffusion layer 430 may be furtherdisposed on the upper surface of the resin layer 420. For example, theupper surface of the resin layer 420 may have an adhesive force, and thediffusion layer 430 may be adhered to the resin layer 420. For example,the upper surface of the resin layer 420 may be adhered to the diffusionlayer 430 by an adhesive force having fine cilia. At this time, thediffusion layer 430 may be attached to the resin layer 420 by applying apredetermined pressure or pressure/heat. Since the diffusion layer 430is adhered to the resin layer 420 by self-adhesive force without aseparate adhesive, it is possible to reduce the process of separatelyattaching the adhesive, and it is possible to avoid using an adhesiveharmful to the human body, thereby reducing process or material waste.

The material of the diffusion layer 430 may be a light-transmittingmaterial. The diffusion layer 430 may include at least one of apolyester (PET) film, a poly methyl methacrylate (PMMA) material, or apolycarbonate (PC). The diffusion layer 430 may be provided as a filmmade of a resin material such as silicone or epoxy. The diffusion layer430 may include a single layer or multiple layers.

The diffusion layer 430 may diffuse the light emitted through the resinlayer 420. In addition, since a specific color may not be mixed when theluminous intensity of light is high, the diffusion layer 430 may diffuseand mix the lights.

The thickness of the diffusion layer 430 may be about 25 μm or more. Forexample, the thickness of the diffusion layer 430 may be about 25 μm toabout 250 μm. In detail, the thickness of the diffusion layer 430 may beabout 100 μm to about 250 μm. The diffusion layer 430 may have theabove-described thickness range and may provide incident light as auniform surface light source.

The diffusion layer 430 may include at least one or two or more of adiffusion agent such as beads, a phosphor, and ink particles. Thephosphor may include, for example, at least one of a red phosphor, anamber phosphor, a yellow phosphor, a green phosphor, and a whitephosphor. The ink particles may include at least one of metal ink, UVink, and curing ink. The size of the ink particles may be smaller thanthe size of the phosphor. The surface color of the ink particles may beany one of green, red, yellow, and blue. The ink types may beselectively applied among PVC (Poly vinyl chloride) ink, PC(Polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer)ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink,water-based ink, plastic ink, PMMA (poly methyl methacrylate) ink and PS(Polystyrene) ink. The ink particles may include at least one of metalink, UV ink, and curing ink.

FIG. 10 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 , and FIG. 11 is an enlarged view of a regionA3 of FIG. 10 . In the description using FIGS. 10 and 11 , descriptionsof the same and similar components as those of the above-describedlighting module are omitted, and the same reference numerals areassigned to the same and similar components.

Referring to FIGS. 10 and 11 , a light blocking portion 425 may befurther disposed on the resin layer 420. The light blocking portion 425may face the upper surface of the substrate 401. The light blockingportion 425 may be disposed between the resin layer 420 and thediffusion layer 430. The light blocking portion 425 may overlap thelight emitting device 100 in a third direction defined in the z-axisdirection. The light blocking portion 425 may be printed by overlappinga plurality of layers on the lower surface of the diffusion layer 430,and the light blocking portion 425 may have a structure including aplurality of patterns having different sizes.

In addition, the light blocking portion 425 may be disposed to extendalong an emission direction of the light emitted from the light emittingdevice 100. For example, the light blocking portion 425 may be disposedto extend to a region in which the plurality of dots 411 are disposed.In this case, the light blocking portion 425 may not overlap theplurality of dots 411 in the third direction. That is, the lightblocking portion 425 may partially overlap the light emitting device 100and be formed in a region that does not overlap the plurality of dots411. Alternatively, the light blocking portion 425 may be disposed in aregion where a part overlaps the light emitting device 100 and the otherpart overlaps the plurality of dots 411. In this case, an area of thelight blocking portion 425 overlapping the plurality of dots 411 may beless than or equal to about 30% of an area of the light blocking portion425 not overlapping the plurality of dots 411.

A width of the light blocking portion 425 in the first direction may begreater than a width of the light emitting device 100 in the firstdirection. Also, a width of the light blocking portion 425 in the seconddirection may be greater than a width of the light emitting device 100in the second direction.

When viewed from the top, the planar shape of the light blocking portion425 may have various shapes, such as a circular shape, an ellipticalshape, and a polygonal shape. For example, the planar shape of the lightblocking portion 425 may include a shape including a curve inconsideration of the light beam angle of the light emitting device 100.

The number of the light blocking portions 425 may be the same as thenumber of the light emitting devices 100. The light blocking portion 425may be provided with a size or area sufficient to prevent a hot spotcaused by the light emitted in the exit direction of the light emittingdevice 100 on each of the light emitting devices 100. In addition, sincethe light emitting device 100 emits light in the side direction, thatis, in the first direction, the light blocking portion 425 covers aregion in which the light blocking efficiency by the light beamdistribution and reflection characteristics of the light emitting device100 may be increased.

An adhesive layer 440 may be disposed around the light blocking portion425. The adhesive layer 440 may be disposed between the resin layer 420and the diffusion layer 430. The adhesive layer 440 may be disposed onthe upper surface of the resin layer 420 in a region where the lightblocking portion 425 is not disposed. The adhesive layer 440 may includea light-transmitting adhesive material. The adhesive layer 440 mayadhere the resin layer 420 and the diffusion layer 430 to each other.

FIG. 12 is another cross-sectional view showing a cross-section takenalong line A-A′ of FIG. 5 . In the description using FIG. 12 ,descriptions of the same and similar components as those of the lightingmodule described above are omitted, and the same reference numerals areassigned to the same and similar components.

Referring to FIG. 12 , a plurality of light emitting devices 100 may bedisposed on the substrate 401. The plurality of light emitting devices100 may be of a top view type electrically connected to the substrate401. The plurality of light emitting devices 100 may be disposed on thesubstrate 401 at set intervals. For example, the plurality of lightemitting devices 100 may be disposed at equal intervals in the firstdirection. Also, the plurality of light emitting devices 100 may bedisposed at equal intervals in the second direction.

Accordingly, the lighting module 400 including the plurality of lightemitting devices 100 may emit light as a surface light source. Thelighting module 400 may emit light in a direction of an opened upperportion of the housing 300.

FIG. 13 is a front view illustrating a light emitting device on asubstrate in a lighting module according to an embodiment, and FIG. 14is a side view of the light emitting device of FIG. 13 .

Referring to FIGS. 13 and 14 , the light emitting device 100 includes abody 10 having a cavity 20, a plurality of lead frames 30 and 40 in thecavity 20, and a light emitting chip 71 disposed on at least one of aplurality of lead frames 30 and 40. The light emitting device 100 may beimplemented as a side view type package.

The body 10 may include a cavity 20 in which the lead frames 30 and 40are exposed at the bottom. The plurality of lead frames 30 and 40 areseparated into, for example, a first lead frame 30 and a second leadframe 40 and coupled to the body 10.

The body 10 may be formed of an insulating material. The body 10 may beformed of a reflective material. The body 10 may be formed of a materialhaving a reflectance higher than a transmittance for a wavelengthemitted from the light emitting chip, for example, a material having areflectance of 70% or more. When the reflectivity is 70% or more, thebody 10 may be defined as a non-transmissive material or a reflectivematerial. The body 10 may be formed of a resin-based insulatingmaterial, for example, a resin material such as polyphthalamide (PPA).The body 10 may be formed of a silicone-based, epoxy-based, orthermosetting resin including a plastic material, or a high heat andlight resistance material. The body 10 includes a white-based resin. Anacid anhydride, an antioxidant, a mold release material, a lightreflector, an inorganic filler, a curing catalyst, a light stabilizer, alubricant, and titanium dioxide may be selectively added in the body 10.The body 10 may be molded by at least one selected from the groupconsisting of an epoxy resin, a modified epoxy resin, a silicone resin,a modified silicone resin, an acrylic resin, and a urethane resin. Forexample, an epoxy resin composition which is formed by adding an epoxyresin composed of triglycidyl isocyanurate, hydrogenated bisphenol Adiglycidyl ether, etc. and an acid anhydride composed ofhexahydrophthalic anhydride, 3-methylhexahydrophthalic anhydride,4-methylhexahydrophthalic anhydride, etc. with 1,8-diazabicyclo (5,4,0)undecene-7 (DBU) as a curing agent, ethylene glycol as a co-catalyst,titanium oxide pigment, and glass fiber in the epoxy resin, partiallycuring by heating, and a solid epoxy resin composition obtained bycuring and forming B staging may be used, and the present invention isnot limited thereto. The body 10 may be suitably mixed with at least oneselected from the group consisting of a diffusing agent, a pigment, afluorescent material, a reflective material, a light-blocking material,a light stabilizer, and a lubricant.

The body 10 may include a reflective material, for example, a resinmaterial to which a metal oxide is added, and the metal oxide mayinclude at least one of TiO2, SiO2, and Al₂O₃. This body 10 mayeffectively reflect incident light. As another example, the body 10 maybe formed of a light-transmitting resin material or a resin materialhaving a phosphor that converts the wavelength of incident light. Thebottom of the body 10 may be a side surface corresponding to thesubstrate 401.

The first lead frame 30 includes a first lead portion 31 disposed on thebottom of the cavity 20, a first bonding portion 32 and a first heatdissipating portion 33 extending outside the body 10. The first bondingportion 32 is bent from the first lead portion 31 in the body 10 andprotrudes outside the body, and the first heat dissipating portion 33may be bent from the first bonding portion 32.

The second lead frame 40 includes a second lead portion 41 disposed atthe bottom of the cavity 20, a second bonding portion 42 and a secondheat dissipating portion 43 disposed outside the body 10. The secondbonding portion 42 may be bent from the second lead part 41 in the body10, and the second heat dissipating portion 43 may be bent from thesecond bonding portion 42.

Here, the light emitting chip 71 may be disposed on the first leadportion 31 of the first lead frame 30, for example, and connected to thefirst and second lead portions 31 and 41 by wire, or may be connectedwith the first lead portion 31 and may be connected to the second leadportion 41 by a wire. The light emitting chip 71 may be a horizontaltype chip, a vertical type chip, or a chip having a via structure. Thelight emitting chip 71 may be mounted in a flip chip manner. The lightemitting chip 71 may selectively emit light within a wavelength range ofultraviolet to visible light. The light emitting chip 71 may emit lightwith an ultraviolet or blue peak wavelength, for example. The lightemitting chip 71 may include at least one of a group II-VI compounds anda group III-V compounds. The light emitting chip 71 may be formed of,for example, a compound selected from the group consisting of GaN,AlGaN, InGaN, AlInGaN, GaP, AlN, GaAs, AlGaAs, InP, and mixturesthereof.

One or a plurality of light emitting chips 71 may be disposed in thecavity 20 and emit light with the greatest intensity in the direction ofthe central axis Y0.

One or a plurality of light emitting chips disposed in the cavity 20 ofthe light emitting device 100 according to the embodiment may bedisposed. The light emitting chip may be selected from, for example, ared LED chip, a blue LED chip, a green LED chip, and a yellow green LEDchip.

A molding member 80 is disposed in the cavity 20 of the body 11, and themolding member 80 includes a light-transmitting resin such as siliconeor epoxy, and may be formed in a single layer or multiple layers. Aphosphor for changing a wavelength of light emitted from the moldingmember 80 or the light emitting chip 71 may be included, and thephosphor excites a part of light emitted from the light emitting chip 71and is emitted as light to have a different wavelength. The phosphor maybe selectively formed from quantum dots, YAG, TAG, Silicate, Nitride,and Oxy-nitride-based materials. The phosphor may include at least oneof a red phosphor, a yellow phosphor, and a green phosphor, but is notlimited thereto. The emission surface 81 of the molding member 80 may beformed in a flat shape, a concave shape, a convex shape, and the like,but is not limited thereto. As another example, a light-transmittingfilm having a phosphor may be disposed on the cavity 20, but theembodiment is not limited thereto.

A lens may be further formed on the upper portion of the body 10, andthe lens may include a structure of a concave and/or convex lens, andmay adjust the light distribution of the light emitted by the lightemitting device 100.

A semiconductor device such as a light receiving device and a protectiondevice may be mounted on the body 10 or any one lead frame, and theprotection device may be implemented as a thyristor, a Zener diode, or aTVS (transient voltage suppression). The Zener diode protects the lightemitting chip from electro static discharge (ESD).

At least one or a plurality of light emitting devices 100 are disposedon the substrate 401, and a reflective member 410 is disposed around alower portion of the light emitting device 100. The first and secondlead portions 33 and 43 of the light emitting device 100 are bonded tothe pads 403 and 405 of the substrate 401 with solder or conductive tapeas conductive adhesive members 203 and 205.

The optical assembly 10 according to the embodiment may be used as arear-view mirror assembly of a vehicle. For example, the opticalassembly 10 may be disposed on the left and right-side mirrors of thevehicle to provide vehicle information located on the rear side to thedriver.

FIG. 15 is an exploded perspective view of the rear-view mirror assemblyaccording to the embodiment, and FIG. 16 is a cross-sectional view ofthe rear-view mirror assembly according to the embodiment. In addition,FIG. 17 is a top view of the blocking member according to theembodiment.

In the description of FIGS. 15 to 17 , a structure in which the opticalassembly 10 is applied to the left-side mirror adjacent to the driver'sseat will be described. In the case of the right-side mirror adjacent tothe passenger seat, the components of the optical assembly 10 issymmetrical to each other in the same shape, so for convenience ofdescription, the structure applied to the left-side mirror adjacent tothe driver's seat will be centered.

Referring to FIGS. 15 to 17 , the rear-view mirror assembly 2000 mayinclude a cover case 810, a mirror member 820, and an optical assembly10.

The cover case 810 may be exposed to the outside of the vehicle. Forexample, the cover case 810 may be a cover of a side mirror disposed onthe left and right-sides of the vehicle, respectively. The cover case810 may include a material having predetermined rigidity andreliability. The cover case 810 may include a material capable ofmaintaining reliability from the outside in a vehicle stopping ordriving environment.

The cover case 810 may include an opened one side and a receiving space805 therein. The cover case 810 may accommodate the optical assembly 10and the mirror member 820.

The mirror member 820 may be disposed in the receiving space 805 of thecover case 810. The mirror member 820 may be disposed so that a bottomsurface 821 of the mirror member 820 faces the receiving space 805. Anupper surface 822 of the mirror member 820 may be exposed to theoutside. The bottom surface 821 and the upper surface 822 of the mirrormember 820 may be provided as at least one of a flat surface and acurved surface. The mirror member 820 may be a semi-transparent memberincluding a mirror or a display. The mirror member 820 may transmit thelight emitted from the optical assembly 10. For example, a partialregion of the mirror member 820, for example, a region overlapping theoptical assembly 10 may transmit light emitted from the optical assembly10.

The optical assembly 10 may be disposed in the receiving space 805 ofthe cover case 810. The optical assembly 10 may be disposed between themirror member 820 and the cover case 810. For example, the opticalassembly 10 may be disposed on the bottom surface 821 of the mirrormember 820 facing the receiving space 805 of the cover case 810. Theoptical assembly 10 may emit light in the direction of the opened regionof the cover case 810. The optical assembly 10 may emit light toward thebottom surface 821 of the mirror member 820.

In this case, the height between the lighting module 400 and the mirrormember 820 may change. The vertical direction (V-axis direction) heightbetween the upper surface of the lighting module 400 and the lowersurface 821 of the mirror member 820 may increase in a direction fromthe first inner surface IS1 to the second inner surface IS2. Inaddition, although not shown in the drawings, the vertical (V-axisdirection) height between the upper surface of the lighting module 400and the lower surface 821 of the mirror member 820 may decrease in adirection from the third inner surface IS3 to the fourth inner surfaceIS4. And, the vertical height between the upper surface of the lightingmodule 400 and the lower surface 821 of the mirror member 820 mayincrease in a direction from the second intersection point P2 of thelighting module 400 to the fifth side surface S5.

A blocking member 700 may be disposed on the optical assembly 10. Theblocking member 700 may be disposed between the optical assembly 10 andthe mirror member 820. The blocking member 700 may be disposed in aregion overlapping the optical assembly 10. The blocking member 700 maydirectly contact the bottom surface 821 of the mirror member 820.

The blocking member 700 may include an opening region 710 and anon-transmissive region 720.

The opening region 710 may be a region through which the light emittedfrom the optical assembly 10 is transmitted. That is, the light emittedfrom the optical assembly 10 may be emitted in the direction of themirror member 820 through the opening region 710 and may be provided tothe outside.

In addition, the non-transmissive region 720 may be a region other thanthe opening region 710, and may be a region through which the lightemitted from the optical assembly 10 is not transmitted. For example,the non-transmissive region 720 may be implemented using black or whiteink.

That is, the opening region 710 may be an effective region through whichlight is transmitted, and the non-transmissive region 720 may be anineffective region through which light is not transmitted.

In this case, the light emitting device 100 of the optical assembly 10may be disposed in a region overlapping the blocking member 700 in avertical direction (V-axis direction). Here, the vertical direction(V-axis direction) may mean a height direction of the housing 300.

In detail, the light emitting device 100 may be disposed in a regionthat does not overlap the opening region 710 of the blocking member 700in a vertical direction (V-axis direction), and may be overlapped with avertical direction with the non-transmissive region 720.

Also, the opening region 710 may be disposed in a region overlapping theplurality of dots 411 of the reflective member 410 in a verticaldirection (V-axis direction). For example, the opening region 710 mayvertically overlap the region R1 in which the plurality of dots 411 aredisposed. In this case, the light emitted from the light emitting device100 may be reflected by the dots 411 to be effectively emitted in thedirection of the opening region 710. Accordingly, loss of light emittedfrom the optical assembly 10 may be minimized.

In addition, when the optical assembly 10 includes the light blockingportion 425 as shown in FIG. 10 , the light blocking portion 425 may bedisposed in a region not overlap the opening region 710 of the blockingmember 700 in the vertical direction (V-axis direction), and may bevertically overlapped with the non-transmissive region 720. Accordingly,it is possible to guide the light emitted from the light emitting device100 to be emitted in the direction of the opening region 710.

Accordingly, in the embodiment, the loss of light emitted from the lightemitting device 100 may be minimized, and the direction and luminancevalue of light emitted to the outside of the mirror member 820 throughthe opening region 710 may be controlled.

The rear-view mirror assembly 2000 may include an indicator portion 850.The indicator portion 850 may have a shape such as a logo, text, oricon. The indicator portion 850 may be formed on the mirror member 820.In detail, the indicator portion 850 may be formed in a region of themirror member 820 that vertically overlaps with the opening region 710of the blocking member 700. The indicator portion 850 may verticallyoverlap with the region R1 in which the plurality of dots 411 aredisposed. The indicator portion 850 may be provided as an openingportion in the mirror member 820 or may be implemented using coloredink.

Accordingly, the light emitted from the optical assembly 10 may passthrough the opening region 710 and the indicator portion 850, and ashape of the indicator portion 850 may be visually recognized from theoutside of the mirror member 820.

In addition, the indicator portion 850 may be haze-treated. Accordingly,when light is not emitted from the optical assembly 10, the opticalassembly 10 may not be viewed from the outside of the mirror member 820.

Also, although not shown in the drawings, the indicator portion 850 maybe formed on the blocking member 700. In detail, the indicator portion850 may be formed in the opening region 710 of the blocking member 700.Accordingly, the light emitted from the optical assembly 10 may passthrough the indicator portion 850 formed in the opening region 710, anda shape of the indicator portion 850 may be visually recognized from theoutside of the mirror member 820.

Also, although not shown in the drawings, the indicator portion 850 maybe formed on the mirror member 820 and the blocking member 700. Indetail, the indicator portion 850 may be formed in an opening region 710of the blocking member 700 and a region of the mirror member 820corresponding to the opening region 710, respectively. Accordingly, theshape of the indicator portion 850 visually recognized from the outsideof the mirror member 820 may have a three-dimensional effect.

The rear-view mirror assembly 2000 may include a sensing unit (notshown) and a control unit (not shown).

The sensing unit may include a radar, a laser, a sound wave, an imagesensor, and the like, and may be disposed at the rear and/or side of thevehicle. The sensing unit may detect another vehicle located at the rearand/or side of the vehicle.

The control unit is connected to the sensing unit and may control theoperation of the optical assembly 10. For example, when there is anothervehicle on the rear side of the vehicle, the sensing unit may detectinformation about the vehicle. Thereafter, the sensing unit may providethe sensed information to the control unit. Subsequently, the controlunit may apply a signal for light emission ON to the optical assembly10. Accordingly, the driver of the vehicle may visually recognize theshape of the logo and/or icon displayed on the upper surface 822 of themirror member 820 through the optical assembly 10 and the blockingmember 700, and information about the presence of another vehicle on therear side of the vehicle may be provided.

Also, when the other vehicle disappears from the side and rear of thevehicle in which the driver is riding, the sensing unit may detectinformation about the other vehicle. Thereafter, the sensing unit mayprovide the sensed information to the control unit, and the control unitmay apply a signal for turning off light emission to the opticalassembly 10.

In this case, the lighting module 400 according to the embodiment may beinclined. In detail, an upper surface of the optical assembly 10 maycontact the blocking member 700, and an upper surface of the blockingmember 700 may contact a bottom surface 821 of the mirror member 820.

Accordingly, the lighting module 400 of the optical assembly 10 may bedisposed to be inclined with respect to the bottom surface 821 of themirror member 820. In detail, based on the direction from the firstinner surface IS1 toward the second inner surface IS2, the lightingmodule 400 may be inclined at the first inclination angle a1. Inaddition, the lighting module 400 may be inclined at the secondinclination angle a2 from the third inner surface IS3 toward the fourthinner surface IS4. That is, the lighting module 400 may be inclined inthe direction of the fifth inner surface IS5 at the first intersectionpoint P1 of the housing 300. In more detail, the bottom surface 310 ofthe housing 300 may be inclined as described above, and the lightingmodule 400 and the optical member 500 disposed on the bottom surface 310may have an inclined shape at an inclination angle within theabove-described range.

Accordingly, the rear-view mirror assembly 2000 according to theembodiment minimizes light loss and maximizes the amount of lightemitted through the mirror member 820, and an exit direction of theemitted light and a luminance value of the light according to the exitdirection may be controlled.

FIG. 18 is a view for explaining an exit angle of light emitted from therear-view mirror assembly according to the embodiment. In thedescription of FIG. 18 , the description will be given of application tothe left-side mirror adjacent to the driver's seat. In the case of theright-side mirror adjacent to the passenger seat, since the componentsincluding the optical assembly 10 are symmetrical to each other in thesame shape, for convenience of description, the structure applied to theleft-side mirror will be centered.

Referring to FIG. 18 , the rear-view mirror assembly 2000 according tothe embodiment may provide the driver with vehicle information locatedon the rear side. For example, in a region overlapping the opticalassembly 10, the first region R1 and the second region R2 may be dividedbased on a virtual line L1 extending in a direction perpendicular to theextension direction of the rear-view mirror assembly 2000. Here, thefirst region R1 may be a region in which the driver 1 is located, andthe second region R2 may be a region in which another vehicle 2 or anobject located at the rear side of the vehicle in which the driver 1 isboarded is located.

In the rear-view mirror assembly 2000 according to the embodiment, whenanother vehicle 2 is located in the second region R2, the light emittedfrom the optical assembly 10 may be emitted to the outside through theblocking member 700 and the mirror member 820.

In this case, the lighting module 400 may be disposed to be inclinedwith respect to the bottom surface 310 of the mirror member 820 asdescribed above. For example, the lighting module 400 may be disposed tobe inclined in a direction corresponding to the first region R1 in whichthe driver 1 is located. Accordingly, the light emitted from therear-view mirror assembly 2000 through the mirror member 820 may beemitted in a set direction and may have different luminance valuesaccording to the exit direction.

For example, the luminance value of the light emitted in the directionof the first region R1 where the driver 1 is located may be differentfrom the luminance value of the light emitted in the direction of thesecond region R2 where the other vehicle 2 is located. In detail, theluminance value of the light emitted in the direction of the firstregion R1 may be greater than the luminance value of the light emittedin the direction of the second region R2.

Accordingly, the rear-view mirror assembly 2000 according to theembodiment may provide a high-luminance light to the driver 1 located inthe first region R1. In addition, the rear-view mirror assembly 2000 mayprovide light of a relatively low luminance to the other vehicle 2 inthe second region R2 located at the rear side of the vehicle of thedriver 1.

Accordingly, the driver 1 may effectively visually recognize the shapeof the indicator portion 850. In addition, the light emitted from therear-view mirror assembly 2000 in the direction of the other vehicle 2positioned at the rear side of the driver 1 may be minimized.Accordingly, it is possible to minimize or prevent the driver of theother vehicle 2 from being disturbed by the light.

Features, structures, effects, and the like described in the embodimentsabove are included in at least one embodiment of the invention, and arenot necessarily limited to only one embodiment. Furthermore, thefeatures, structures, effects, and the like illustrated in eachembodiment may be combined or modified for other embodiments by a personhaving ordinary knowledge in the field to which the embodiments belong.Accordingly, contents related to such combinations and modificationsshould be construed as being included in the scope of the invention.

In addition, although the examples have been described above, these areonly examples and do not limit the invention, and those of ordinaryskill in the field to which the invention pertains are illustrated abovewithin the scope not departing from the essential characteristics of thepresent embodiment. It will be seen that various modifications andapplications that have not been made are possible. For example, eachcomponent specifically shown in the embodiment can be modified andimplemented. And differences related to these modifications andapplications should be construed as being included in the scope of theinvention defined in the appended claims.

1. An optical assembly comprising: a housing including a receiving spacein which an upper portion is opened, an inclined bottom surface withinthe receiving space, and a plurality of inner surfaces around thereceiving space; a lighting module disposed on the inclined bottomsurface; and an optical member disposed on the lighting module, whereinthe lighting module includes: a substrate disposed on the inclinedbottom surface; at least one light emitting device disposed on thesubstrate; and a resin layer disposed on the light emitting device andthe substrate, wherein the plurality of inner surfaces includes a firstinner surface facing a first side of the lighting module, a second innersurface facing a second side of the lighting module opposite to thefirst side of the lighting module, a third inner surface facing a thirdside of the lighting module, and a fourth inner surface facing a fourthside of the lighting module opposite to the third side of the lightingmodule, and wherein a depth of the third inner surface within thereceiving space of the housing is greater than a depth of the fourthinner surface.
 2. The optical assembly of claim 1, wherein the lightingmodule is inclined on the inclined bottom surface of the receivingspace.
 3. The optical assembly of claim 1, wherein a vertical distancebetween an upper end of the fourth side of the lighting module and anupper end of the fourth inner surface of the housing is greater than avertical distance between an upper end of the third side of the lightingmodule and the upper end of the third inner surface of the housing. 4.The optical assembly of claim 1, wherein a length of the first side ofthe lighting module in a first direction is smaller than a length of thethird side in a second direction, and wherein the first direction andthe second direction are perpendicular to each other, and the first sideand the second side of the lighting module are disposed on oppositesides to each other with respect to the first direction.
 5. The opticalassembly of claim 4, wherein a length of the third side of the lightingmodule in a second direction is greater than the length of the fourthside in the second direction.
 6. The optical assembly of claim 1,wherein thicknesses of the first to fourth side of the lighting moduleare substantially the same.
 7. The optical assembly of claim 1, whereinthe light emitting device is disposed adjacent to the first side in theresin layer, wherein a length of the fourth side of the lighting modulein a second direction is smaller than the length of the third side inthe second direction, and wherein the third and fourth sides aredisposed on opposite sides of the lighting module in the seconddirection.
 8. The optical assembly of claim 7, wherein the lightemitting device emits light toward the second side of the lightingmodule, and wherein an upper surface of the resin layer emits light bydiffusing light emitted from the light emitting device.
 9. The opticalassembly of claim 1, comprising: a cover member disposed on the opticalmember within the receiving space, wherein the optical member isdisposed between an upper surface of the lighting module and a lowersurface of the cover member.
 10. The optical assembly of claim 9,wherein the upper surface of the cover member is substantially parallelto an upper surface of the housing, and wherein the upper surface of thecover member is substantially disposed not parallel to the upper surfaceof the lighting module.
 11. The optical assembly of claim 9, wherein alower surface of the cover member is inclined with respect to the uppersurface of the cover member.
 12. The optical assembly of claim 1,wherein the optical assembly includes a rear-view mirror assembly of avehicle.
 13. A rear-view mirror assembly comprising: an optical assemblycomprises: a housing including a receiving space in which an upperportion is opened and an inclined bottom surface within the receivingspace; a lighting module disposed on the inclined bottom surface; and anoptical member disposed on the lighting module within the receivingspace; a mirror member disposed on the optical member of the opticalassembly; and a blocking member disposed between the housing and themirror member, wherein the blocking member includes an opening regionand a non-transmissive region, wherein the opening region of theblocking member is a region through which light emitted from the opticalassembly is transmitted, wherein the light emitted from the opticalassembly is emitted in a direction of the mirror member through theopening region and is provided to an outside, wherein the rear-viewmirror assembly includes a first region and a second region based on avirtual line overlapping the optical assembly and extending in adirection perpendicular to an extension direction of the mirror member,wherein the first region is a region where a driver of a vehicle islocated, and the second region is a region where another vehicle orobject is located outside a region where the driver is located, andwherein a luminance value of light emitted in a direction of the firstregion from the optical assembly is greater than a luminance value oflight emitted in a direction of the second region from the opticalassembly.
 14. The rear-view mirror assembly of claim 13, wherein thelighting module includes: a substrate disposed on the inclined bottomsurface; at least one light emitting device disposed on the substrate;and a resin layer disposed on the light emitting device and thesubstrate.
 15. The rear-view mirror assembly claim 14, wherein thelighting module is inclined with respect to the mirror member.
 16. Therear-view mirror assembly of 14, wherein the housing includes aplurality of inner surface around the receiving space, and wherein theplurality of inner surfaces includes a first inner surface facing afirst side of the lighting module, a second inner surface facing asecond side opposite of the lighting module to the first side of thelighting module, a third inner surface facing a third side of thelighting module, and a fourth inner surface facing a fourth side of thelighting module opposite to the third side of the lighting module. 17.The rear-view mirror assembly of 16, wherein a depth of the third innersurface within the receiving space of the housing is greater than adepth of the fourth inner surface.
 18. The rear-view mirror assembly ofclaim 16, wherein a vertical distance between an upper end of the fourthside of the lighting module and an upper end of the fourth inner surfaceof the housing is greater than a vertical distance between an upper endof the third side of the lighting module and the upper end of the thirdinner surface of the housing, wherein a length of the first side of thelighting module in a first direction is smaller than a length of thethird side in a second direction, and wherein the first direction andthe second direction are perpendicular to each other, and the first sideand the second side of the lighting module are disposed on oppositesides to each other with respect to the first direction.
 19. Therear-view mirror assembly of claim 18, wherein a length of the thirdside of the lighting module in a second direction is greater than thelength of the fourth side in the second direction.
 20. The opticalassembly of claim 14, wherein thicknesses of the first to fourth side ofthe lighting module are substantially the same, wherein the lightemitting device is disposed adjacent to the first side in the resinlayer, wherein the light emitting device emits light toward the secondside of the lighting module, and wherein an upper surface of the resinlayer emits light by diffusing light emitted from the light emittingdevice.